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95f72d1e YL |
1 | #ifndef _LINUX_MEMBLOCK_H |
2 | #define _LINUX_MEMBLOCK_H | |
3 | #ifdef __KERNEL__ | |
4 | ||
f0b37fad | 5 | #ifdef CONFIG_HAVE_MEMBLOCK |
95f72d1e YL |
6 | /* |
7 | * Logical memory blocks. | |
8 | * | |
9 | * Copyright (C) 2001 Peter Bergner, IBM Corp. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License | |
13 | * as published by the Free Software Foundation; either version | |
14 | * 2 of the License, or (at your option) any later version. | |
15 | */ | |
16 | ||
17 | #include <linux/init.h> | |
18 | #include <linux/mm.h> | |
19 | ||
411a25a8 BH |
20 | #include <asm/memblock.h> |
21 | ||
37d8d4bf | 22 | #define INIT_MEMBLOCK_REGIONS 128 |
25818f0f | 23 | #define MEMBLOCK_ERROR 0 |
95f72d1e | 24 | |
e3239ff9 | 25 | struct memblock_region { |
2898cc4c BH |
26 | phys_addr_t base; |
27 | phys_addr_t size; | |
95f72d1e YL |
28 | }; |
29 | ||
e3239ff9 | 30 | struct memblock_type { |
bf23c51f BH |
31 | unsigned long cnt; /* number of regions */ |
32 | unsigned long max; /* size of the allocated array */ | |
33 | struct memblock_region *regions; | |
95f72d1e YL |
34 | }; |
35 | ||
36 | struct memblock { | |
2898cc4c | 37 | phys_addr_t current_limit; |
4734b594 | 38 | phys_addr_t memory_size; /* Updated by memblock_analyze() */ |
e3239ff9 BH |
39 | struct memblock_type memory; |
40 | struct memblock_type reserved; | |
95f72d1e YL |
41 | }; |
42 | ||
43 | extern struct memblock memblock; | |
5e63cf43 YL |
44 | extern int memblock_debug; |
45 | extern int memblock_can_resize; | |
46 | ||
47 | #define memblock_dbg(fmt, ...) \ | |
48 | if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) | |
95f72d1e YL |
49 | |
50 | extern void __init memblock_init(void); | |
51 | extern void __init memblock_analyze(void); | |
2898cc4c BH |
52 | extern long memblock_add(phys_addr_t base, phys_addr_t size); |
53 | extern long memblock_remove(phys_addr_t base, phys_addr_t size); | |
54 | extern long __init memblock_free(phys_addr_t base, phys_addr_t size); | |
55 | extern long __init memblock_reserve(phys_addr_t base, phys_addr_t size); | |
e63075a3 | 56 | |
c196f76f BH |
57 | /* The numa aware allocator is only available if |
58 | * CONFIG_ARCH_POPULATES_NODE_MAP is set | |
59 | */ | |
9d1e2492 BH |
60 | extern phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, |
61 | int nid); | |
62 | extern phys_addr_t __init memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, | |
63 | int nid); | |
64 | ||
2898cc4c | 65 | extern phys_addr_t __init memblock_alloc(phys_addr_t size, phys_addr_t align); |
e63075a3 BH |
66 | |
67 | /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */ | |
2898cc4c | 68 | #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) |
e63075a3 BH |
69 | #define MEMBLOCK_ALLOC_ACCESSIBLE 0 |
70 | ||
2898cc4c | 71 | extern phys_addr_t __init memblock_alloc_base(phys_addr_t size, |
9d3c30f5 BH |
72 | phys_addr_t align, |
73 | phys_addr_t max_addr); | |
2898cc4c | 74 | extern phys_addr_t __init __memblock_alloc_base(phys_addr_t size, |
9d3c30f5 BH |
75 | phys_addr_t align, |
76 | phys_addr_t max_addr); | |
2898cc4c BH |
77 | extern phys_addr_t __init memblock_phys_mem_size(void); |
78 | extern phys_addr_t memblock_end_of_DRAM(void); | |
79 | extern void __init memblock_enforce_memory_limit(phys_addr_t memory_limit); | |
80 | extern int memblock_is_memory(phys_addr_t addr); | |
81 | extern int memblock_is_region_memory(phys_addr_t base, phys_addr_t size); | |
82 | extern int __init memblock_is_reserved(phys_addr_t addr); | |
83 | extern int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size); | |
95f72d1e YL |
84 | |
85 | extern void memblock_dump_all(void); | |
86 | ||
35a1f0bd | 87 | /* Provided by the architecture */ |
2898cc4c | 88 | extern phys_addr_t memblock_nid_range(phys_addr_t start, phys_addr_t end, int *nid); |
d2cd563b BH |
89 | extern int memblock_memory_can_coalesce(phys_addr_t addr1, phys_addr_t size1, |
90 | phys_addr_t addr2, phys_addr_t size2); | |
35a1f0bd | 91 | |
e63075a3 BH |
92 | /** |
93 | * memblock_set_current_limit - Set the current allocation limit to allow | |
94 | * limiting allocations to what is currently | |
95 | * accessible during boot | |
96 | * @limit: New limit value (physical address) | |
97 | */ | |
2898cc4c | 98 | extern void memblock_set_current_limit(phys_addr_t limit); |
e63075a3 | 99 | |
35a1f0bd | 100 | |
5b385f25 BH |
101 | /* |
102 | * pfn conversion functions | |
103 | * | |
104 | * While the memory MEMBLOCKs should always be page aligned, the reserved | |
105 | * MEMBLOCKs may not be. This accessor attempt to provide a very clear | |
106 | * idea of what they return for such non aligned MEMBLOCKs. | |
107 | */ | |
108 | ||
109 | /** | |
110 | * memblock_region_base_pfn - Return the lowest pfn intersecting with the region | |
111 | * @reg: memblock_region structure | |
112 | */ | |
113 | static inline unsigned long memblock_region_base_pfn(const struct memblock_region *reg) | |
114 | { | |
115 | return reg->base >> PAGE_SHIFT; | |
116 | } | |
117 | ||
118 | /** | |
119 | * memblock_region_last_pfn - Return the highest pfn intersecting with the region | |
120 | * @reg: memblock_region structure | |
121 | */ | |
122 | static inline unsigned long memblock_region_last_pfn(const struct memblock_region *reg) | |
123 | { | |
124 | return (reg->base + reg->size - 1) >> PAGE_SHIFT; | |
125 | } | |
126 | ||
127 | /** | |
128 | * memblock_region_end_pfn - Return the pfn of the first page following the region | |
129 | * but not intersecting it | |
130 | * @reg: memblock_region structure | |
131 | */ | |
132 | static inline unsigned long memblock_region_end_pfn(const struct memblock_region *reg) | |
133 | { | |
134 | return memblock_region_last_pfn(reg) + 1; | |
135 | } | |
136 | ||
137 | /** | |
138 | * memblock_region_pages - Return the number of pages covering a region | |
139 | * @reg: memblock_region structure | |
140 | */ | |
141 | static inline unsigned long memblock_region_pages(const struct memblock_region *reg) | |
142 | { | |
143 | return memblock_region_end_pfn(reg) - memblock_region_end_pfn(reg); | |
144 | } | |
145 | ||
146 | #define for_each_memblock(memblock_type, region) \ | |
147 | for (region = memblock.memblock_type.regions; \ | |
148 | region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \ | |
149 | region++) | |
150 | ||
151 | ||
10d06439 YL |
152 | #ifdef ARCH_DISCARD_MEMBLOCK |
153 | #define __init_memblock __init | |
154 | #define __initdata_memblock __initdata | |
155 | #else | |
156 | #define __init_memblock | |
157 | #define __initdata_memblock | |
158 | #endif | |
159 | ||
f0b37fad YL |
160 | #endif /* CONFIG_HAVE_MEMBLOCK */ |
161 | ||
95f72d1e YL |
162 | #endif /* __KERNEL__ */ |
163 | ||
164 | #endif /* _LINUX_MEMBLOCK_H */ |